268888729473 has 96 divisors (see below), whose sum is σ = 500812562432. Its totient is φ = 135206755200.

The previous prime is 268888729457. The next prime is 268888729477. The reversal of 268888729473 is 374927888862.

268888729473 is a `hidden beast` number, since 2 + 6 + 8 + 8 + 88 + 72 + 9 + 473 = 666.

It is not a de Polignac number, because 268888729473 - 2⁴ = 268888729457 is a prime.

It is a super-2 number, since 2×268888729473² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (268888729477) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1622028 + ... + 1780098.

Almost surely, 2^268888729473 is an apocalyptic number.

It is an amenable number.

268888729473 is a deficient number, since it is larger than the sum of its proper divisors (231923832959).

268888729473 is a wasteful number, since it uses less digits than its factorization.

268888729473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158195 (or 158192 counting only the distinct ones).

The product of its digits is 520224768, while the sum is 72.

The spelling of 268888729473 in words is "two hundred sixty-eight billion, eight hundred eighty-eight million, seven hundred twenty-nine thousand, four hundred seventy-three".